Electrode holder



Oct. 2, 1945. l. J. ANDERSEN ELECTRODE HOLDER Filed April 26, 1943 Patented Oct. 2, 1945 UNITED STATES FATENT OFFICE ELECTRODE HOLDER Ingvart J. Andersen, Oakland, Calif.

Application April 26, 1943, Serial No. 484,521

4 Claims.

My invention relates to improvements in an electrode holder for aro welding, which embodies at once a handle and a holder for removably securing the welding rod.

An object of the invention is the provision of a handy, safe and thoroughly reliable holder.

Other and more specific objects and purposes of the invention will become apparent as the specification continues.

It is to be noted that while but a single embodiment of the present invention is shown in the accompanying drawing, changes in the precise embodiment thereof may be made within the scope of what is claimed without departing from the spirit thereof.

In the accompanying drawing- Figure 1 is a side elevational view of the holder showing a portion of a welding rod removably secured in one position thereon;

Figure 2 is an enlarged vertical axial sectional View showing coacting parts comprising the chassis or framework of the invention disposed in relative positions for clamping the welding rod therebetween;

Figure 3 is a side elevational view of the lower unit of the framework;

Figure 4 is a side elevational view of the upper unit of the framework;

Figure 5 is a cross sectional view on line 5-5 of Fig. 2;

Figure 6 is a cross section on line -6, Fig. 2;

Figure 7 is a cross section on line -l", Fig. 2;

Figure 8 is a sectional View on line 8*-8, Fig. 2, showing a fragmental portion of the welding rod disposed in horizontal position;

Figure 9 is a iront elevational view of the upper end portion of the holder and a cross sectional view of the welding rod disposed in oblique position thereon;

Figure l is a vertical sectional View of the upper end portion of theupper unit and the stop plate;

Figure ll is a side elevational View of the upper end portion of the upper unit, showing the stop plate disposed thereagainst; and

Figure 12 is a vertical section on line i2'-i2 of Fig. 11.

Referring now to the drawing in stricter detail, throughout which like reference characters designate like parts:

The numerals I and 2 designate the upper and lower units, respectively, comprising the frame or chassis of the present holder.

The lower unit 2 embodies a tubular part 3 and an upstanding stem part 4 having a lower diametrically enlarged portion 5 rigidly secured to a mid portion of the inner wall of the part 3.

The upper end of the part 3 is internally threaded as at 6.

The upper unit I comprises a tubular member l disposed to circumferentially encircle the stem 4 with its lower externally threaded end 8 projecting into and threadedly engaging the internal threads of the part 3.

A cylindrical bearing plug 9 is fitted into the upper end of the tube 'I and xedly secured therein by means of a pin I0 projecting transversely through both said plug and tube.

The lower surface of the plug 9 extends obliquely with respect to the axis of the tube 'I and has a centrally disposed groove II extending along said surface.

Openings I2, I3 in opposite wall portions of the tube 'l align with the groove I I and, in cooperation therewith, form a bearing in which to secure the reduced end portion I4 of the welding rod I5 disposed to project through said openings.

The portion I4 of the welding rod is firmly but removably held in the groove I I by stem 4 moved upwards to press thereagainst by the proper relative rotation of the units I and 2, Obviously, to release the welding rod, the said units would be rotated, relatively, in the opposite directions.

The welding rod I5 may, if desired to facilitate its application to certain work to be performed, be disposed at right angles to the holder as shown in Fig. 8, instead of obliquely as indicated in Figs. l and 2. In which instance the portion I4 is projected through opposed openings Il, IB in the walls of the tube 'I and the stem 4 moved upwards to contact and press said portion I4 rmly against the upper margins of said openings, by relative rotative movement of the units I and 2 as above described for securing the welding rod in its oblique position.

The stem 4 is of lesser diameter than the interior diameter of the tubev l, whereby an air space is provided between said stem and tube. However, to maintain the stem centrally in the tube, the upper end portion thereof is provided with a diametrically enlarged portion I9, which fits closely but readily rotatively and vertically movable in said tube. This enlarged portion of the stem also functions as means for preventing scale and sputterings of hot metal and the like from traveling downwards between the stem and the inner wall of the tube to the threads of the lower unit and thereby interfering with the proper functional movements of the units.

A set screw 20 threaded through a threaded opening 2l in one side wall of the lower unit 2, coacting with a clamping plate 22, functions for clamping one end of a current supply cable 23 firmly against the inner wall of said unit.

A hood element 24, formed of suitable insulating material, embraces the upper portion of the tube 'I and is lixedly secured thereto by means of the pin I0, both ends of which project through openings 25, 25 formed therein,

.A slot 26? in the upper end portion of the hood .24 permits free passage of the portion ILl of the welding rod to the openings I2, I3 and groove II when the rod is disposed in oblique position.

An opening 21 in the hood 24 permits free en trance of the Portion I 4 into the openings Il, I8 when the Welding rod is disposed inhorizontal position. l

A stop plate 23, indicated in Figs. 5, 10, 114 and 12, disposed between the upper end portion ofthe tube 'I and hood 24, functions as a stop against whichA the free end' of the portion I6' may abut when it is inserted into either its oblique or horizontal position.

' Openings 29, `BIB, in the stop plate 28, through which the pin'4 lil extends',` holds the plate in fixed position between the tube l and' hood 2li.

An opening SI' on one side o'f'the plate 28 (Fig. l-l, 12) permits free passage of the portion I4 therethrough when disposed in horizontal: position.

A tubular housing IBI', formedr of insulating material, encircles the lower unit 2 and is iirmly secured thereto by means of a pin 32, which projects both through the Walls ofV the said unit and the housing 3 I.

The lower endl of theV hood 21% terminates downwardly short of the lower end of the tube` 'I andv has' at its lower end an annular recess 33 into which movably projects the upper end of an insulating sleeve 34, the lower end of which nor'- mally seats on the upper end of the unit 2, which terminates upwardly short of the housing 3|'.

rIhel sleeve 34, which' preferably has certain vertical as well as rotative movement rela-tive to` the parts 2li' and SI, is primarily Vadapted as insulating means for protecting the operator from contacting the tube l, which is in electric contact with the welding current.

Longitudinally extending ribs` 35, $5', formed on theperiphery of the hood 2d, provide means' to begripped by the operator when operatively rotating the upper and lower units relatively.

The parts comprising the units I and 2 form the electrical connection between the cable 2:3 and the Welding rod l 5;

The* pin IB, which is inelectrical contact with the unit I, is preferablyformedof nonconducting material, or, if preferred, the same may bel made of metal and its ends madeY to terminate short of the outer surface of the hood member 2li.

I claim:

1*. In an electrode holder of thecharacter described, a tubular base element open at its upper and lower ends, a centrally disposed stem member rigidly secured at its lower end within Vthe tubular base element with its upper portion projecting upwardly and extending beyond the upper end of the tubular base, said stem member being spaced inwardly from the wall of the tubular base element throughout the length of the upper open end of said element, a tubular cap element housing the upper portion of the stem member and adjustably secured to the base element, a bearing plug arranged within the upper end of the cap element and adapted to cooperate with the upper end of the stem member to clamp a welding rod therebetween when the tubular cap element is adjusted relative to the base element, and means for securing an electric supply cable to the lower open end of the tubular base element.

2. In an electrode holder of the character dei scribed, a tubular base element open at its upper and lower ends and having a solid mid-section therein, an upwardly extending stem member secured at its ybase to the mid-section and projecting beyond the upper end of the tubular element, said stem member being inwardly spaced and free from contact with the wall of the tubular base element, a tubular cap element housing the upper portion of the stem member and' having a threaded engagement with the base element, a bearing plug carried by the cap element and' arranged to cooperate with the upperV end of the stem member to clamp an electrode therebetween when the tubular cap element is rotated relative to the base element,r and means for removably securing one end' of an electric supply cable within the lower open end. of the tubular base element.

3; In an electrode holder of the character described, a tubular base element open at its upper and lower ends and having a solid mid-section therein, an upwardly extending centrally spaced stem member secured' at its base to the midsection and projecting freely beyond the upper end of the tubular member, .a tubular cap element housing the upper portion of the stem and being adjustably connected t0' the tubular element, said stem being relatively spaced' from the inner side walls of the upper end 'of the tubular member and the tubular cap to provide an air circulating space along the length of the stem, said cap element and said: stem having cooperating parts to clamp an electrode therebetween when the cap is adjusted relative to the stem, and means for securing an electric supply cable to the lower open end of the tubular base element.

4. In an electrode holder of the character described, a metallic tubular base element having an axially extending stem projecting upwardly therefrom, a metallic tubular cap element housing the upper portion ofthe stem and' being adjustably connected to the base element, a bearing plug arranged within the cap element and adapted to `cooperate with the upper end' of the stem member to clampk a welding rod therebetween when the cap element is adjustedV relative to the base element', an insulating hood arranged over the' upper portion of the cap element, an insulating tubular handle arranged over the base' member and a sleeve of insulating material surrounding the lower portion of the cap element intermediate the insulating hood and the insulating tubular handle.

INGVART J. ANDERSEN. 

